PSMOUSE_RET_BAT
if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
psmouse->packet[1] == PSMOUSE_RET_BAT)) {
if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)